Mox Opal [Kaladesh Inventions] SM19 then you can Special Summon

then you can Special Summon this monster from your hand or Deck

Set: Duelist Pack: Yugi Card type: Fusion/Effect Monster Rarity: Ultra Rare Attack: 2900 Defense: 2400 "Dark Magician" + "Buster Blader" This monster cannot be Special Summoned except by Fusion Summon

In that case

Set: Legendary Collection 3: Yugi's World Card type: Normal Spell Rarity: Secret Rare Draw 3 cards

you can target up to 3 cards your opponent controls instead

Mox Opal [Kaladesh Inventions] SM19 then you can Special SummonSet: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft {T}: Add one mana of any color. Activate this ability only if you control three or more artifacts. On loan from a private collection, this unique mechanism extracts power from a carefully prepared gemstone.